Nathan Paton
This already exists:

It's a shame only a few developers use it.
In that case, we need to promote the developers who use it.
Most developers package all version together; plus patches. One would have to have market products for each version and users would not get free upgrades to modules.
Nathan Paton
Market entries support multiple files.
What? Look at some market downloads from the top vendors. Often one zip, inside two or three zips for different versions and then updates and sql updates etc. No, not simple to just upgrade. They would have to have a single zip that contains only one version packaged so that the updater could use it.
Below is the legacy version of the Boonex site, maintained for Dolphin.Pro 7.x support.
The new Dolphin solution is powered by UNA Community Management System.